Flood-gate having movable closing body.



Patented Dec. I6, I902.

. m. CABSTANJEN,

(Application filed Sept. 22, 1902.)

INVENTOR FLOOOGATE HAVING MOVABLE CLOSING BODY.

(no mm.)

WITWESSES:

UNTTED STATEs PATENT OFFICE.

MAX CARSTANJEN, OF WIESBADEN, GERMANY, ASSIGNOR TO THE FIRM OF VEREINIGTE MASCHINENFABRIK AUGSBURG UND MASOHINENBAUGE- SELLSOHAFT .NURNBERG A. G., OF NUREMBERG, GERMANY.

FLOOD-GATE HAVIN G MOVABLE CLOSING BODY.

SPECIFICATION forming part of Letters Patent No. 715,979, dated December 16, 1902.

Application filed September 22,1902. Serial No. 124,430. (No model.)

To all whom it may concern.-

Be it known that 1, MAX CARSTANJEN, director, a subject of the Emperor of Germany, residing in Wiesbaden, in the Empire of Germany, (whose full postal address is 6 Alexanderstrasse, Wiesbaden aforesaid,) have invented certain new and useful Improvements in Flood Gates Having Movable Closing Bodies, of which the following is a specifica- 10 tion.

This invention relates to afurther improvement of the dam or fiood gate already pat ented, in which a movableroller-shaped closing body is mounted with its ends on horizontal or inclined roller-tracks and may be rolled forward on these latter out of reach of the flowing water in the direction of the flow. The perfectly straight course of the rollertracks provided in this flood-gate or dam arrangement has the drawback that the roller. in its lowest position in which it is intended to exert the damming action of the water must be held fast by ropes or pawls. Should it not be desired to employ these latter, the danger would arise that the roller would be rolled upward a short distance along the roller-tracks by the pressure of the water when it was at a high level, as it is only possible to give these roller-tracks a moderate inclination of about forty-five degrees in order to allow of the moving upward again of the roller. A further peculiarity of the straight course of the roller-tracks consists in that when the closing body is rolled upward the pull of the rope in the lowest position of the closing body is only small on account of the action of the winding-up device and then grows in proportion as the roller emerges from the Water. Now both the unintentional upward movement of the closing body and also the inequality of the strain on the rope when rolling up the roller are avoided by the present invention by making the lower partsb of the roller-tracks e, as shown in Figs. 1 and 2 of the accompanying drawings, with considerably greater inclination than their upper partsthat is to say, bending them down at their deepest points in such a way that each roller-track rises from its lowest point at first 5 almost vertically and then gradually emerges along a convex curve 1) into a straight lesssteeply-pitched part 2. By this means the result is attained that the roller a in the position of closing the dam, which position is shown in full lines, cannot be moved upward even by a strong water-pressure along the convex part of the roller-track, but remains lying by its own weight on the beam (1, fixed in firm protective supports. Consequently the pawl devices mentioned in the previ- 6o. ous patent may be omitted, and this improved arrangement has the advantage that a considerably simplified apparatus may be adopted for moving up and down the closing body, while in the arrangement described in the previous patent a guide-pulley Z was em ployed on the surface at the other end of the rolling-track, around which pulley the rope or the like ran in such a way as to allow of a downwardly-directed pull on the roller being exerted. Such a pull is not necessary in this improved flood -gate arrangement, and the means for guiding the rope may thus be considerably simplified. In the form of construction shown, for instance, merely a single drum m, arranged at the upper end of the rolling-track, is employed, around which the rope or the like 70 is wound several times, as it is around the roller (1, and thus the drum 0% produces a rolling up and down of the roller a when rotated. The ends of the rope or the like are fixed at suitable places on the periphery of the drum m and the roller a, respectively, so that the rope no longer requires to be an endless one, and consequently also the parts necessary for keeping taut the endless rope employed in the older form of construction may be dispensed with. Finally this improved arrangement has the advantage that when the roller is being rolled up the rope winding arrangement may have approximately the same dimensions in all positions of the roller (1, more particularly if the curve of the under part of the roller-track b be suitably selected, which may be of impor- 5 tance in many cases as affecting the choice of the means for operating the apparatus.

I declare that what I claim is An improvement in roller-tracks for use in flood-gates in which the damming body is 1C0 rolled upward and downward, consisting in the tracks being formed in such manner as to rise approximately vertically from the lower end, and then to curve over in a convex curve into a straight less-inclined part, whereby any movement of the roller by great force of water is prevented.

In witness whereof I have hereunto set my hand in presence of two Witnesses.

MAX CARSTANJ EN.

Witnesses:

HENRY DOLLMANN, MAX BAUM. 

